Caisson



May 9, 1933. wl T. FlTzPATRlcK CAISSON Filed Deo. 5, 1931 O o o MOM ,o f y Patented May 9, 1933 PATENT FFC WALTER r. nrrzrn'rniox; or LARc'HMoN'r, New YORK caisson Y Application led December 5, 1931. Serial No. 579,202.

15 of which will be pointed out in appended claims.

Referring to the drawing,

Fig. 1 is a sectional elevation showing the base member with molds attached;

Fig. 2 is a similar view with the lower section of the caisson completed and the molds removed; and

Fig. 3 is a sectional elevation of a completed pier foundation.

" In carrying out this invention a base member is formed of an outer shell 10 of desired size and shape with an inner shell having an edge portion 11, an oblique body 12 and a flange 13 parallel with the shell 10.

la Between the edge portion 11 and the shell 10 is a reenforcing sheet 14 and these parts are fastened together in some suitable manner, such as welding to form a three-ply cutting or supporting edge 15.

35 16 is a vertical reenforcing rod which is bent under horizontal reenforcements 17 which, if desired, may be passed through metallic plates 18. This base member is filled with concrete up to the irregular 40 line 19.

An outer sectional mold 2O and an inner collapsible mold 21 are affixed to the base member by bolts 22. A channel structure 23 is placed near the top of the inner mold 21 with threaded anchors projecting down through it. Horizontal reenforcements 25 are put in place before both of the molds are set up, 30 designates pipes which pro- 0 lower ends beveled to coincide with the outer ject through the oblique body 12 with their f surface of the part 12. 31 are couplings on the `upper ends of these pipes. 32 are other pipes, the lower ends of which are screwed into the couplings 31. 33 are couplings on the upper endsv of pipes 32.

The parts thus described are shown in Fig. 1.

The neXt step in this method consists in filling the space between the molds 20 and 21 with concrete 26. Vertical reinforcements 6o 16A are embedded in the upper part of this concrete and its upper surface is finished with a depression 27. Then the molds 20 and 21 are removed'and moved up tothe positions in which they are shown at 20A 65 and 21A in Fig. 2, andother pipes 34: are screwed into the couplings 33. y

The channel 23 forms a niche or groove to receive a diaphragm and door mechanism when compressed air methods are to be used. '70

Now the base portion has a hollow shell 26 ofconcrete extending upwardly from it. The material `under the edge 15 of the base member may be removed and discharged through this shell, thus permitting the parts r to settle and sink until a satisfactory foundation bearing material is reached. While this is going on a second section or shell26A is being formed with its lower edge filling the depression 27 in the upper edge of the so shell 26. Holding bolts 28 :for air loch parts may be embedded in the upper Vpart of the section 26A. l/Vhen the soil is suitable7 the `excavation may be eifected by jets of water ntroducedthrough the pipes 30. y 85 This method is repeated until af hollow shell of desired height has been formed. Then the inside of the shell thus formed is filled up to the line 29, Fig. 3.

A cap 40 of concrete is then formed on' 90 top of the filled caisson. The mold 2O may be used for this. `Vertical reenforcements 16B are carried up to and `bent over horizontal reenforcements lll, as shown at 16C. 42 designates other horizontal reenforcee ments. The cap 40 will receive and support the superstructure for which this foundation is prepared."

Oneway of practicing this method has been described and one way of constructing.' 100 the parts of the caisson illustrated, but variations and modifications may be made without departing from the spirit and scope of the invention and I intend no limitations other than those imposed by the appended claims.

What I claim is:

l. The combination of a base member having spaced inner and outer walls, a hollow concrete shell section having Walls extending upwardly from and in line with said walls of the base member and another hollow ooncrete shell section resting upon the first mentioned shell havingr walls extending upwardly and in line with the walls of said first section.

2. The combination of a base member having spaced inner and outer walls, a hollow concrete shell section having walls extending upwardly from and in line with said walls of the base member, another hollow concrete shell section resting upon the first mentioned shell having walls extending upwardly and in line with the walls of said first section and reenforcements tying said base and shell sections together. Y

3. The combination of a' base member having spaced inner and outer walls, a hollow concrete shell section having walls extending upwardly from and in line with said walls of the base member, another hollow concrete shell section resting upon the first mentioned shell having walls extending upwardly and in line with the walls of said first section, a filler in the base member and the shell sections, a cap on the upper shell section and the filler and reenforcements tying said base, shell sections and cap together.

7. A caisson supporting base comprising an outer wall member having straight vertical sides, an inner member having a lower portion overlapping and aiiixed to the lower portion of the outer wall member, an upper wallmember portion spaced inwardly from and parallel with the outer wall member and an intermediate oblique portion, and means for detachably connecting separate molds to the upper portions of said wall members.

8. A caisson supporting base comprising an outer wall member having straight vertical sides, an inner member having a lower portion overlapping and aiiixed to the lower portion of the outer wall member, an upper wall member portion spaced inwardly from and parallel with the outer wall member and an intermediate oblique portion, pipes .extending through said oblique portion, means for detachably connecting separate molds to the upper portions of said wall members and other pipes to said first mentioned pipes.

VVlrL'lERl T. FITZPATRICK.

first section' and airlock retaining means between adjacent shell sections.

4:. The combination of a base member having spaced inner and outer walls, a hollow concrete shellv section having walls extending upwardly from and in line with said walls of thebase member, another hollow concrete shell section resting upon the rst mentioned shell-having walls extending upwardly and in line with the walls of said krst mentioned shell having walls extending upwardly and in line with the walls of said first section, a filler in the base member and the shelly sections and aV cap on the upper,

shell section and the'tiller.

6. The combination of a base member having spaced inner and outer walls, a hollow concrete shell section having walls extendingr upwardly from and in line with said Vwalls of the base member, another hollow concrete shall section resting upon the first mentioned shell having walls extending upwardly and in line lwith the wallsv of said llO 

